Richard Parke Welcher

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Old Greenwich, CT, US

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Patents Grantslast 30 patents

Information Patent Grant
Controlled polymerization of dimethyldiallylammonium halides by the...
- Patent number 4,092,467
- Issue date May 30, 1978
- American Cyanamid Company
- Richard P. Welcher
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for the high molecular weight polymers of diallyldimethylam...
- Patent number 4,064,333
- Issue date Dec 20, 1977
- American Cyanamid Company
- Robert Rabinowitz
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...